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<div class="titlepage"><div><div><h3 class="title">
<a name="boost_asio.reference.execution__submit"></a><a class="link" href="execution__submit.html" title="execution::submit">execution::submit</a>
</h3></div></div></div>
<p>
        <a class="indexterm" name="boost_asio.indexterm.execution__submit"></a> 
A customisation point
        that submits a sender to a receiver.
      </p>
<pre class="programlisting">constexpr unspecified submit = unspecified;
</pre>
<p>
        The name <code class="computeroutput">execution::submit</code> denotes a customisation point object.
        For some subexpressions <code class="computeroutput">s</code> and <code class="computeroutput">r</code>, let <code class="computeroutput">S</code>
        be a type such that <code class="computeroutput">decltype((s))</code> is <code class="computeroutput">S</code> and let
        <code class="computeroutput">R</code> be a type such that <code class="computeroutput">decltype((r))</code> is <code class="computeroutput">R</code>.
        The expression <code class="computeroutput">execution::submit(s, r)</code> is ill-formed if <code class="computeroutput">sender_to&lt;S,
        R&gt;</code> is not <code class="computeroutput">true</code>. Otherwise, it is expression-equivalent
        to:
      </p>
<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
<li class="listitem">
            <code class="computeroutput">s.submit(r)</code>, if that expression is valid and <code class="computeroutput">S</code>
            models <code class="computeroutput">sender</code>. If the function selected does not submit
            the receiver object <code class="computeroutput">r</code> via the sender <code class="computeroutput">s</code>, the
            program is ill-formed with no diagnostic required.
          </li>
<li class="listitem">
            Otherwise, <code class="computeroutput">submit(s, r)</code>, if that expression is valid and
            <code class="computeroutput">S</code> models <code class="computeroutput">sender</code>, with overload resolution performed
            in a context that includes the declaration <code class="computeroutput">void submit();</code>
            and that does not include a declaration of <code class="computeroutput">execution::submit</code>.
            If the function selected by overload resolution does not submit the receiver
            object <code class="computeroutput">r</code> via the sender <code class="computeroutput">s</code>, the program is ill-formed
            with no diagnostic required.
          </li>
<li class="listitem">
            Otherwise, <code class="computeroutput">execution::start((new submit_receiver&lt;S, R&gt;{s,r})-&gt;state_)</code>,
            where <code class="computeroutput">submit_receiver</code> is an implementation-defined class
            template equivalent to:
          </li>
</ul></div>
<pre class="programlisting">template&lt;class S, class R&gt;
  struct submit_receiver {
    struct wrap {
      submit_receiver * p_;
      template&lt;class...As&gt;
        requires receiver_of&lt;R, As...&gt;
      void set_value(As&amp;&amp;... as) &amp;&amp;
        noexcept(is_nothrow_receiver_of_v&lt;R, As...&gt;) {
        execution::set_value(std::move(p_-&gt;r_), (As&amp;&amp;) as...);
        delete p_;
      }
      template&lt;class E&gt;
        requires receiver&lt;R, E&gt;
      void set_error(E&amp;&amp; e) &amp;&amp; noexcept {
        execution::set_error(std::move(p_-&gt;r_), (E&amp;&amp;) e);
        delete p_;
      }
      void set_done() &amp;&amp; noexcept {
        execution::set_done(std::move(p_-&gt;r_));
        delete p_;
      }
    };
    remove_cvref_t&lt;R&gt; r_;
    connect_result_t&lt;S, wrap&gt; state_;
    submit_receiver(S&amp;&amp; s, R&amp;&amp; r)
      : r_((R&amp;&amp;) r)
      , state_(execution::connect((S&amp;&amp;) s, wrap{this})) {}
  };
</pre>
<h5>
<a name="boost_asio.reference.execution__submit.h0"></a>
        <span class="phrase"><a name="boost_asio.reference.execution__submit.requirements"></a></span><a class="link" href="execution__submit.html#boost_asio.reference.execution__submit.requirements">Requirements</a>
      </h5>
<p>
        <span class="emphasis"><em>Header: </em></span><code class="literal">boost/asio/execution/submit.hpp</code>
      </p>
<p>
        <span class="emphasis"><em>Convenience header: </em></span><code class="literal">boost/asio/execution.hpp</code>
      </p>
</div>
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<td align="right"><div class="copyright-footer">Copyright © 2003-2021 Christopher
      M. Kohlhoff<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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